I think there is a difference between in your own time choosing to play a Ukraine gig, supporting travel rights for artists and supporting gay marriage and making your tour, for which your wide range of fans have paid a lot of money, in any way political. Politics is a big turn off for many people, and not really what you want in a gig even when it is e.g. Bono the multi-millionaire telling you to support his favourite undoubtedly worthy charities.